BX 2670 motor hitting frame

[Bdm300]

Bought a new BX2670 a couple months ago and love it. Got a fel, mmm and a 50" rev tine tiller but is primarily used for mowing 3 acres of mostly flat ground. But since new I have had a knocking/vibration sensation that could be felt throughout the tractor. Very noticeable. The times I feel it are when traversing alongside a hillside and making abrupt quick turns. The hillside is probably less than 15 degrees. I finally tracked down the spot that is causing the vibration/knocking issue. The bracket that bolts to the motor to the rubber mounts has a 1/4" tab welded to it and it sits perpendicular to the frame with about an 1/8" gap between the tab and frame. Its the same on both sides of motor. Well I've found that when I get on an angle or turn abruptly the motor shifts and that tab vibrates on the frame. No harm yet but very frustrating. I took to dealer to look at but didn't find anything obvious and have not heard any others doing this. They are waiting to hear back from the Kubota Techs. Sorry for the long story but curious if anyone else has heard of this before? From what I've gathered on the the web is that the older 26hp bx's would occasionally break the rubber motor mounts. So Kubota updated the mount by welding on these tabs keeping the motor harnessed better between the frame to prevent excessive motor movement breaking the mounts. So I get why they are there but hope its not something I have to live with on a $15,000 machine. Any help would be appreciated.

Thanks

 

[Zick]

According to this thread, it sounds like you already have an upgraded motor mount style. Wonder if these new designs are a bad design?

http://www.tractorbynet.com/forums/...oken-engine-mounts.html?highlight=motor+mount

 

[Bdm300]

Yeah I read that too. I've read where a couple others are having same issue. Feels to me like the rubber compound is just too soft and flexible for the larger 26 horse motor.

 

[chucky79]

almost feels like a grinding/binding of the 4 wheel drive when it happens like gears meshing out of time? Mine makes a similar vibration / noise in sharp turns or when mowing my incline in the pasture but i have a new bx2370. I just checked all my fluids and haven't paid it much attention beyond that. Im just keeping tabs on things for now but will check those mounts like you mentioned to see if that could be my issue too. Its kinda hard to describe but that's the best analogy i can come up with, any count its not all that bad when it happens. Just a slight noise and vibration and lets up once im in the straight again.

 

[Bdm300]

Yep, sounds like the same issue.

 

[BCBSLICK]

Bought a new BX2670 a couple months ago and love it. Got a fel, mmm and a 50" rev tine tiller but is primarily used for mowing 3 acres of mostly flat ground. But since new I have had a knocking/vibration sensation that could be felt throughout the tractor. Very noticeable. The times I feel it are when traversing alongside a hillside and making abrupt quick turns. The hillside is probably less than 15 degrees. I finally tracked down the spot that is causing the vibration/knocking issue. The bracket that bolts to the motor to the rubber mounts has a 1/4" tab welded to it and it sits perpendicular to the frame with about an 1/8" gap between the tab and frame. Its the same on both sides of motor. Well I've found that when I get on an angle or turn abruptly the motor shifts and that tab vibrates on the frame. No harm yet but very frustrating. I took to dealer to look at but didn't find anything obvious and have not heard any others doing this. They are waiting to hear back from the Kubota Techs. Sorry for the long story but curious if anyone else has heard of this before? From what I've gathered on the the web is that the older 26hp bx's would occasionally break the rubber motor mounts. So Kubota updated the mount by welding on these tabs keeping the motor harnessed better between the frame to prevent excessive motor movement breaking the mounts. So I get why they are there but hope its not something I have to live with on a $15,000 machine. Any help would be appreciated.

Thanks

almost feels like a grinding/binding of the 4 wheel drive when it happens like gears meshing out of time? Mine makes a similar vibration / noise in sharp turns or when mowing my incline in the pasture but i have a new bx2370. I just checked all my fluids and haven't paid it much attention beyond that. Im just keeping tabs on things for now but will check those mounts like you mentioned to see if that could be my issue too. Its kinda hard to describe but that's the best analogy i can come up with, any count its not all that bad when it happens. Just a slight noise and vibration and lets up once im in the straight again.

Interesting to read this. I just stopped in to inquire about inner tubes for the front tires of my 2670...

When I purchased my tractor in the late spring of 2013 all seemed good, UNTIL I started to mow some of the hillsides I own...

What a terrible noise as discribed in both of the posts I am attempting to quote...

It does it on hillsides and sharp turns on most any hillside--even those not steep at all...

The dealer came and looked at it and found the motor mount issue. He tightened them, or centered them, I really don't recall. All went well, but it is starting to do it again this year...

Guess I will check to see if they are loose again...

I wonder if Kubota will change them?--Probably not...

But they way, the mounting bracket on my 60" deck was out of line also--what a terrible job on and offing the deck. I checked it with a square and the bracket was not square to the pins that hold it in place--got that bracket replaced. Anyone else have that problem?...

But, the main purpose of this post is to verify that I too had problems with the motor mounts...

This 2670 has been the worst one I have owned since I started with an 18 hp years ago and worked my way up to the 26 hp...

Disappointing for sure...

BCB

 

[craigbaill]

Mine does it on the hills if I the right side is on the upside. Doesnt do it if im in the same exact spot and the left side of the tractor is on the upside of the hill. I am not going to worry about it but I will keep an eye out to see if the engine shifts. Other than that it is an amazing tractor.

BTW I checked the tractor when it had 3 hours, 10 and 40 hours and the mounts are tight.

 

[Bdm300]

The problem with this is that it's not a safety concern or issue that makes the tractor inoperable. But it is an issue that could effect reliability over time. So kubota may not get real excited about fixing this issue right away. But everyone with the issue needs to report it so kubota knows they have an issue and possibly correct the problem. And yes I wasn't real impressed with my front bracket for my mmm either. I got one adjustment nut upfront ran in an inch farther than the other side to keep the deck close to level. The bracket is visibly not symmetric.

 

[sarti]

I also bought a new BX 2670 and I am having the same problem when mowing on hill sides..I haven't talked to dealer yet, didn't know for sure what it was. Glad I found this post, has anyone found a real fix for this yet, like someone said it's aggravating on a high price mower..Also mine has rear pto seal leaking and dash with moisture behind glass

 

[bx2670]

Mine does it on the hills if I the right side is on the upside. Doesnt do it if im in the same exact spot and the left side of the tractor is on the upside of the hill. I am not going to worry about it but I will keep an eye out to see if the engine shifts. Other than that it is an amazing tractor.

BTW I checked the tractor when it had 3 hours, 10 and 40 hours and the mounts are tight.

Same here ,my 2360 did not do this and I'm mowing the same way. I wonder if 4shorts could come up with a fix even though he has the 23 HP motor on his BX 25 D.